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Innovative microwave generated Ultraviolet light disinfection technology for water treatment. Presentation by Paul O'Callaghan CEO of O2 Environmental for the British Columbia Water and Waste Association May 2006

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<ul><li>Objective </li></ul><ul><li>Introduce a new way of generating UV light </li></ul><ul><ul><li>Uses Microwave energy as opposed to electrical energy </li></ul></ul><ul><ul><li>As a result, bulbs do not blow </li></ul></ul>

3.
Structure of Presentation <ul><li>Introduction to UV Disinfection </li></ul><ul><ul><li>What is UV Light? </li></ul></ul><ul><ul><li>How is it generated? </li></ul></ul><ul><ul><li>Brief History of UV Technology </li></ul></ul><ul><li>Describe how new technology works </li></ul><ul><li>Discuss Advantages, Disadvantages & Costs </li></ul>

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What is UV Light? <ul><li>UV is part of the electromagnetic spectrum </li></ul>

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How is UV Light Generated? <ul><li>“ Electrons enter an excited state and on return to a lower energy state they emit energy as radiation” </li></ul><ul><li>Typically generated using an electric current- electrode in a bulb. </li></ul><ul><ul><li>Low Pressure </li></ul></ul><ul><ul><li>Low Pressure High Output </li></ul></ul><ul><ul><li>Medium Pressure </li></ul></ul>

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Microwave UV <ul><li>Advantages </li></ul><ul><ul><li>Bulb warranted for three years. </li></ul></ul><ul><ul><li>UVC output is constant throughout life of bulb </li></ul></ul><ul><ul><li>Only 20% redundancy required </li></ul></ul><ul><ul><li>All serviceable parts are above the waterline </li></ul></ul><ul><ul><li>Lower Whole of Life Costs </li></ul></ul><ul><li>Disadvantages </li></ul><ul><ul><li>Magnetrons have to be replaced </li></ul></ul><ul><ul><li>Power supply has to be replaced </li></ul></ul><ul><ul><li>Magnetrons are quite large results in minimum spacing </li></ul></ul><ul><ul><li>Some attenuation of energy in the wave guide </li></ul></ul>